2-105 hydraulic

[rrlund]

Well...I mentioned below that I put a rebuilt pump on my 2-105 last week because the hydraulics were overheating. I cut hay this morning and after an hour, the light started blinking again. I let it cool off and went back after dinner. I went about 40 minutes this time. There's a Mennonite hydraulic shop a few miles away. I went over there and he said he'd come over tomorrow at 1 and take a look at it. There seems to be a pin hole in the suction hose between the filter and pump. He didn't have any inch and a quarter, so he told me to put a piece of inner tube and some clamps on it and try that. Didn't help. Don't just assume it's the pump if overheats is the lesson here. I'll let you know what he finds.

 

[tom upton]

I have had three occasions now where guys had bought a new pump and the compensator was set higher than the main relief, and for whatever reason mechanic didnt know he had to set compensator, or maybe didnt even know how? One was a Agco dealer. The other issue I have seen is crap from the old pump that was indeed bad had gotten in to the main relief body holding relief open. As you probably know the prerequisite to installing a new pump nessitates cleaning out the valve bodys as pump flow goes directly there with no high pressure filter. Unlike most industrial applications of the same basic pump utilize a high pressure filter. When you think about it a fella should probably look at how hard it would be to plumb in a high pressure filter??

 

[rrlund]

I have had three occasions now where guys had bought a new pump and the compensator was set higher than the main relief, and for whatever reason mechanic didnt know he had to set compensator, or maybe didnt even know how? One was a Agco dealer. The other issue I have seen is crap from the old pump that was indeed bad had gotten in to the main relief body holding relief open. As you probably know the prerequisite to installing a new pump nessitates cleaning out the valve bodys as pump flow goes directly there with no high pressure filter. Unlike most industrial applications of the same basic pump utilize a high pressure filter. When you think about it a fella should probably look at how hard it would be to plumb in a high pressure filter??

Thanks Tom. I'll pass all of this along when he gets here tomorrow.

 

[rrlund]

Well.....here's what happened so far. He backed the compensator out one turn. I thought a had a good test gauge set, but it wasn't as good as I thought. He took a plug out of the relief valve and hooked the hose and gauge up. I started the tractor and it blew the end right off the hose. It soaked him an his clothes, but didn't break the skin. He picked the gauge up off the ground and said "Look at that. Pegged at 4000 pounds."

So now we didn't have a gauge, but he took all three relief valves out of the castings and they looked good. He backed the compensator out two more turns and I drove it to his place. The brakes and steering worked good, the pump was a lot quieter, but there wasn't enough pressure to even lower the 3pt or make the remotes make any sound when I held the levers. I had let it run while I unhooked the haybine, then drove it to his place and I'm not going to tell you the pump was stone cold, but I had no problem holding my hand on it. I'd say warm, but not super hot like it would get in ten minutes before.

I think we're on the right track with the compensator, he just needs to get it dialed in.